Interfacial Electronic Coupling of NC@WO3-W2C Decorated Ru Clusters as a Reversible Catalyst toward Electrocatalytic Hydrogen Oxidation and Evolution Reactions.

Embargo End Date
2022-06-02

Type
Article

Authors
Yang, Yuting
Shao, Xue
Zhou, Shuqing
Yan, Puxuan
Isimjan, Tayirjan T.
Yang, Xiulin

KAUST Department
KAUST Solar Center (KSC)
Physical Science and Engineering (PSE) Division

Online Publication Date
2021-06-17

Print Publication Date
2021-07-22

Date
2021-06-17

Submitted Date
2021-04-30

Abstract
Designing a bifunctional catalyst for hydrogen oxidation reaction (HOR) and hydrogen evolution reaction (HER) is significant toward developing sustainable hydrogen-electric conversion systems. Herein, we develop a cost-effective bifunctional catalyst of Ru/N-doped Carbon@WO3-W2C (Ru/NC@WOC) via co-precipitation and polyol reduction. Ru/NC@WOC shows superior HOR/HER activity in alkaline solution in comparison with commercial Pt/C. HOR electrochemical tests show that the mass activity at 0.05 V (1.96 mA ug-1Ru ) and exchange-current density are 7.5 and 1.2 times that of Pt/C. Additionality, the Ru/NC@WOC exhibit up 30-fold HOR activity in mass activity compared with benchmark Ru/C. Moreover, it also displays exceptional electrocatalytic HER with overpotential of 31 mV@10 mA cm-2 and 119 mV@100 mA cm-2 , surpassing Pt/C, benchmark Ru/C and most of the previously reported electrocatalysts. The outstanding catalytic activity of Ru/NC@WOC probably arises from the synergy between Ru and NC@WOC matrix, suitable hydrogen binding energy, and highly conductive substrate. Thus, this work may pave a new avenue to fabricate low-cost bifunctional HOR/HER catalysts for alkaline fuel cells and water electrolyzer.

Citation
Yang, Y., Shao, X., Zhou, S., Yan, P., Isimjan, T. T., & Yang, X. (2021). Interfacial Electronic Coupling of NC@WO3-W2C Decorated Ru Clusters as a Reversible Catalyst toward Electrocatalytic Hydrogen Oxidation and Evolution Reactions. ChemSusChem. doi:10.1002/cssc.202100893

Publisher
Wiley

Journal
ChemSusChem

DOI
10.1002/cssc.202100893

PubMed ID
34076948

Additional Links
https://onlinelibrary.wiley.com/doi/10.1002/cssc.202100893

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