Partial-Single-Atom, Partial-Nanoparticle Composites Enhance Water Dissociation for Hydrogen Evolution.
Partial-Single-Atom, Partial-Nanoparticle Composites Enhance Water Dissociation for Hydrogen Evolution.
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部分单原子、部分纳米粒子复合材料增强水解离以析氢
DOI:
10.1002/advs.202001881
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发表时间:
2021-01
期刊:
影响因子:
--
通讯作者:
Wang J
中科院分区:
文献类型:
--
作者:
Hu C;Song E;Wang M;Chen W;Huang F;Feng Z;Liu J;Wang J
The development of an efficient electrocatalyst toward the hydrogen evolution reaction (HER) is of significant importance in transforming renewable electricity to pure and clean hydrogen by water splitting. However, the construction of an active electrocatalyst with multiple sites that can promote the dissociation of water molecules still remains a great challenge. Herein, a partial‐single‐atom, partial‐nanoparticle composite consisting of nanosized ruthenium (Ru) nanoparticles (NPs) and individual Ru atoms as an energy‐efficient HER catalyst in alkaline medium is reported. The formation of this unique composite mainly results from the dispersion of Ru NPs to small‐size NPs and single atoms (SAs) on the Fe/N codoped carbon (Fe–N–C) substrate due to the thermodynamic stability. The optimal catalyst exhibits an outstanding HER activity with an ultralow overpotential (9 mV) at 10 mA cm−2 (η 10), a high turnover frequency (8.9 H2 s−1 at 50 mV overpotential), and nearly 100% Faraday efficiency, outperforming the state‐of‐the‐art commercial Pt/C and other reported HER electrocatalysts in alkaline condition. Both experimental and theoretical calculations reveal that the coexistence of Ru NPs and SAs can improve the hydride coupling and water dissociation kinetics, thus synergistically enhancing alkaline hydrogen evolution performance. A nanocomposite of partial‐single‐atom and partial‐nanoparticle formed within the Fe–N–C matrix serves as a multiple‐site electrocatalyst toward hydrogen evolution reaction with an ultralow overpotential of 9 mV to achieve 10 mA cm−2, a high turnover frequency, and ≈100% Faradaic efficiency. Theoretical calculations reveal that ruthenium single‐atoms effectively facilitate water dissociation, and ruthenium nanoparticles promote hydrogen desorption.
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影响因子:
3.7
作者:
Kresse, G;Furthmuller, J
通讯作者:
Furthmuller, J
DOI:
10.1146/annurev-anchem-061010-113906
发表时间:
2011-01-01
期刊:
ANNUAL REVIEW OF ANALYTICAL CHEMISTRY, VOL 4
影响因子:
--
作者:
Frenkel, Anatoly I.;Yevick, Aaron;Vasic, Relja
通讯作者:
Vasic, Relja
影响因子:
17.6
作者:
Ding, Jiabao;Shao, Qi;Huang, Xiaoqing
通讯作者:
Huang, Xiaoqing
影响因子:
4.4
作者:
Smidstrup, Soren;Pedersen, Andreas;Jonsson, Hannes
通讯作者:
Jonsson, Hannes
影响因子:
27.8
作者:
Tabassum, Hassina;Guo, Wenhan;Zou, Ruqiang
通讯作者:
Zou, Ruqiang