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  • Royal Society of Chemistry (RSC)  (6)
  • 2020-2024  (6)
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  • Royal Society of Chemistry (RSC)  (6)
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  • 2020-2024  (6)
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  • 1
    Online Resource
    Online Resource
    Atomically dispersed single Ni site catalysts for high-efficiency CO 2 electroreduction at industrial-level current densities
    Royal Society of Chemistry (RSC) ; 2022
    In:  Energy & Environmental Science Vol. 15, No. 5 ( 2022), p. 2108-2119
    Details
    In: Energy & Environmental Science, Royal Society of Chemistry (RSC), Vol. 15, No. 5 ( 2022), p. 2108-2119
    Abstract: Atomically dispersed and nitrogen-coordinated single Ni sites ( i.e. , NiN x moieties) embedded in partially graphitized carbon have emerged as effective catalysts for CO 2 electroreduction to CO. However, much mystery remains behind the extrinsic and intrinsic factors that govern the overall catalytic CO 2 electrolysis performance. Here, we designed a high-performance single Ni site catalyst through elucidating the structural evolution of NiN x sites during thermal activation and other critical external factors ( e.g. , carbon particle sizes and Ni content) by using Ni–N–C model catalysts derived from nitrogen-doped carbon carbonized from a zeolitic imidazolate framework (ZIF)-8. The N coordination, metal–N bond length, and thermal wrinkling of carbon planes in Ni–N–C catalysts significantly depend on thermal temperatures. Density functional theory (DFT) calculations reveal that the shortening Ni–N bonds in compressively strained NiN 4 sites could intrinsically enhance the CO 2 RR activity and selectivity of the Ni–N–C catalyst. Notably, the NiN 3 active sites with optimal local structures formed at higher temperatures ( e.g. , 1200 °C) are intrinsically more active and CO selective than NiN 4 , providing a new opportunity to design a highly active catalyst via populating NiN 3 sites with increased density. We also studied how morphological factors such as the carbon host particle size and Ni loading alter the final catalyst structure and performance. The implementation of this catalyst in an industrial flow-cell electrolyzer demonstrated an impressive performance for CO generation, achieving a current density of CO up to 726 mA cm −2 with faradaic efficiency of CO above 90%, representing one of the best catalysts for CO 2 reduction to CO.
    Type of Medium: Online Resource
    ISSN: 1754-5692 , 1754-5706
    URL: Article
    DOI: 10.1039/D2EE00318J
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2022
    detail.hit.zdb_id: 2439879-2
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Surface oxygenation induced strong interaction between Pd catalyst and functional support for zinc–air batteries
    Royal Society of Chemistry (RSC) ; 2022
    In:  Energy & Environmental Science Vol. 15, No. 4 ( 2022), p. 1573-1584
    Details
    In: Energy & Environmental Science, Royal Society of Chemistry (RSC), Vol. 15, No. 4 ( 2022), p. 1573-1584
    Abstract: Employing the strong metal-support interaction (SMSI) effect for promoting the catalyst's activity toward the oxygen reduction reaction (ORR) is promising due to the electronic structure optimization and high utilization efficiency of platinum group metal (PGM) catalysts. Metal oxides as alternative supports for PGMs facilitate intrinsic activity and improve durability as compared to conventional carbon supports. However, the restricted mass and electron transfer at the metal/support interface need to be addressed. Herein, to strengthen the interaction at the metal/support interfaces and improve the utilization efficiency of PGM, an ultralow loading of Pd was embedded in a surface-oxygenated PdNiMnO porous film. The Mn-doping was designed to promote surface oxygenation using a facile anodization process that created sufficiently exposed interfaces between Pd and the support, strengthening the SMSI effects at the Pd/oxygenated support interface for enhancing ORR performance. Furthermore, the Ni-containing oxygenated catalyst served as both the active component for the oxygen evolution reaction (OER) and the functional support for stabilizing Pd, making PdNiMnO a bifunctional catalyst for zinc–air flow batteries (ZAFB). As a proof-of-concept, the ZAFB (PdNiMnO) shows a maximal power density of 211.6 mW cm −2 and outstanding cycling stability for over 2000 h with a minimal voltage gap of 0.69 V at a current density of 10 mA cm −2 , superior to the state-of-the-art catalysts.
    Type of Medium: Online Resource
    ISSN: 1754-5692 , 1754-5706
    URL: Article
    DOI: 10.1039/D1EE03972E
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2022
    detail.hit.zdb_id: 2439879-2
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  • 3
    Online Resource
    Online Resource
    Identification and semi-quantification of nitrooxy organosulfates in aerosol particles by HPLC-MS/MS
    Royal Society of Chemistry (RSC) ; 2022
    In:  Analytical Methods Vol. 14, No. 25 ( 2022), p. 2531-2540
    Details
    In: Analytical Methods, Royal Society of Chemistry (RSC), Vol. 14, No. 25 ( 2022), p. 2531-2540
    Abstract: Organosulfates (OSs) derived from the oxidation of biogenic volatile organic compounds (BVOCs) in the presence of anthropogenic sulfate aerosols are the important tracers of secondary organic aerosols (SOAs). In order to better understand the concentration of pinene-nitrooxy organosulfates (pNOSs) in Nanjing, a sensitive high-performance liquid chromatography-electron spray ionization spectrum/mass spectrum (HPLC-ESI-MS/MS) to determine pNOSs in PM 2.5 has been developed and validated in this study. Firstly, Hypersil Gold C 18 (Thermo Scientific, San Jose, USA) was selected to separate pinene-derived nitrooxy organosulfates (pNOSs) based on their polarity. Three kinds of pNOSs were detected in the full scan mode (MS) with an ESI source under the negative mode. Secondly, three isomers of pNOSs with fragment ions m / z 220, 151, and 142 were identified based on the MS/MS maps. At least two pairs of transfer ions should be selected as identification and quantification ions according to the optimization results of target compounds. For example, to determine pNOSs, these transfer ions of m / z 294 → 247, m / z 294 → 231, m / z 294 → 220, m / z 294 → 142, m / z 294 → 151, m / z 294 → 96, m / z 294 → 80 were selected as quantification and identification ions. Finally, the influence of scan mode on pNOS detection was evaluated, and the results showed that pNOSs were most sensitive in the SRM (selected reaction monitor) scan mode. Therefore, the SRM scan mode was chosen to detect pNOSs. We applied this method to analyze year-round PM 2.5 (PM 2.5 is fine particulate matter, which refers to particulate matter in ambient air with an aerodynamic equivalent diameter of less than or equal to 2.5 microns) samples in Nanjing. The average concentration of all the three kinds of pNOSs was 69.95 ng m −3 . The results showed that the average concentration of pNOSs was high in spring (92.94 ng m −3 ) and summer (90.57 ng m −3 ), and lowest in winter (30.03 ng m −3 ).
    Type of Medium: Online Resource
    ISSN: 1759-9660 , 1759-9679
    URL: Article
    DOI: 10.1039/D2AY00460G
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2022
    detail.hit.zdb_id: 2515210-5
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  • 4
    Online Resource
    Online Resource
    Doping-modulated strain control of bifunctional electrocatalysis for rechargeable zinc–air batteries
    Royal Society of Chemistry (RSC) ; 2021
    In:  Energy & Environmental Science Vol. 14, No. 9 ( 2021), p. 5035-5043
    Details
    In: Energy & Environmental Science, Royal Society of Chemistry (RSC), Vol. 14, No. 9 ( 2021), p. 5035-5043
    Abstract: Changes in the local atomic arrangement in a crystal caused by lattice-mismatch-induced strain can efficiently regulate the performance of electrocatalysts for zinc–air batteries (ZABs) in many manners, mainly due to modulated electronic structure configurations that affect the adsorption energies for oxygen-intermediates formed during oxygen reduction and evolution reactions (ORR and OER). However, the application of strain engineering in electrocatalysis has been limited by the strain relaxation caused by structural instability such as dissolution and destruction, leading to insufficient durability towards the ORR/OER. Herein, we propose a doping strategy to modulate the phase transition and formation of self-supported cobalt fluoride–sulfide (CoFS) nanoporous films using a low amount of copper (Cu) as a dopant. This well-defined Cu–CoFS heterostructure overcomes the obstacle of structural instability. Our study of the proposed Cu–CoFS also helps establish the structure–property relationship of strained electrocatalysts by unraveling the role of local strain in regulating the electronic structure of the catalyst. As a proof-of-concept, the Cu–CoFS electrocatalyst with doping-modulated strain exhibited superior onset potentials of 0.91 V and 1.49 V for the ORR and OER, respectively, surpassing commercial Pt/C@RuO 2 and benchmarking non-platinum group metal (non-PGM) catalysts. ZABs with the Cu–CoFS catalyst delivered excellent charge/discharge cycling performance with an extremely low voltage gap of 0.5 V at a current density of 10 mA cm −2 and successively 0.93 V at a high current density of 100 mA cm −2 and afforded an outstanding peak power density of 255 mW cm −2 .
    Type of Medium: Online Resource
    ISSN: 1754-5692 , 1754-5706
    URL: Article
    DOI: 10.1039/D1EE01271A
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2021
    detail.hit.zdb_id: 2439879-2
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  • 5
    Online Resource
    Online Resource
    Stabilizing atomic Pt with trapped interstitial F in alloyed PtCo nanosheets for high-performance zinc-air batteries
    Royal Society of Chemistry (RSC) ; 2020
    In:  Energy & Environmental Science Vol. 13, No. 3 ( 2020), p. 884-895
    Details
    In: Energy & Environmental Science, Royal Society of Chemistry (RSC), Vol. 13, No. 3 ( 2020), p. 884-895
    Type of Medium: Online Resource
    ISSN: 1754-5692 , 1754-5706
    URL: Article
    DOI: 10.1039/C9EE02657F
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2020
    detail.hit.zdb_id: 2439879-2
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  • 6
    Online Resource
    Online Resource
    Boosting alkaline hydrogen evolution: the dominating role of interior modification in surface electrocatalysis
    Royal Society of Chemistry (RSC) ; 2020
    In:  Energy & Environmental Science Vol. 13, No. 9 ( 2020), p. 3110-3118
    Details
    In: Energy & Environmental Science, Royal Society of Chemistry (RSC), Vol. 13, No. 9 ( 2020), p. 3110-3118
    Type of Medium: Online Resource
    ISSN: 1754-5692 , 1754-5706
    URL: Article
    DOI: 10.1039/D0EE01750G
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2020
    detail.hit.zdb_id: 2439879-2
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