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P‐Doping Modulated RuIr Nanoparticles Anchored on Co/N/C Catalysts with Improved Alkaline Hydrogen Evolution Activity and Stability

Journal Article · · Small
 [1];  [1];  [1];  [2];  [1];  [3];  [4];  [5];  [6];  [7];  [1]
  1. Xi'an Jiaotong Univ. (China)
  2. Xi'an Jiaotong Univ. (China); The Chinese University of Hong Kong, Shenzhen, Guangdong (China)
  3. Xi'an Jiaotong Univ. (China); The Chinese University of Hong Kong, Shenzhen, Guangdong (Hong Kong)
  4. Argonne National Laboratory (ANL), Argonne, IL (United States)
  5. Southeast Univ., Nanjing (China). School of Energy and Environment
  6. Shanghai Institute of Space Power‐Sources (China)
  7. Institut National de la Recherche Scientifique (INRS), Varennes, QB (Canada)

Achieving efficient and stable hydrogen evolution reactions in alkaline conditions is crucial for hydrogen production. In this study, a RuIr/Co(SA)NC-P catalyst featuring RuIr alloys alongside P-doping and CoNx sites is developed. RuIr alloying optimizes the electronic structure between Ru and Ir, promoting electron transfer from Ru to Ir. P-doping further modulates the electronic properties of RuIr alloys, optimizing hydrogen binding energy and weakening Ru─OH binding energy, facilitating rapid H2 generation and OHad transfer. Meanwhile, CoNx promotes water dissociation, providing a fast proton delivery path for RuIr alloys. The catalyst exhibits enhanced HER activity with a low overpotential of 20 mV at 10 mA cm−2, a Tafel slope of 20.4 mV dec−1, and a turnover frequency of 19.5 H2 s−1 at 150 mV overpotential. Moreover, catalyst stability is improved 8 times by mitigating RuIr alloy dissolution/agglomeration via P-doping. In conclusion, this work introduces a promising approach for developing efficient and stable HER electrocatalysts.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE; National Key Research and Development Program of China; National Natural Science Foundation of China; Key Research and Development Plan of Shanxi Province; China Postdoctoral Science Foundation; Higher Education Institution Academic Discipline Innovation and Talent Introduction Plan; Fundamental Research Funds for the “Young Talent Support Plan” of Xi'an Jiaotong University
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
2570403
Journal Information:
Small, Journal Name: Small Journal Issue: 4 Vol. 21; ISSN 1613-6810; ISSN 1613-6829
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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Figures / Tables (5)