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• W2890913570 abstract "Exploring earth-abundant and cost-effective catalysts with high activity and stability for a hydrogen evolution reaction (HER) is of great importance to practical applications of alkaline water electrolysis. Here, we report on A-site Ba 2+ -deficiency doping as an effective strategy to enhance the electrochemical activity of BaCo 0.4 Fe 0.4 Zr 0.1 Y 0.1 O<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M3><mml:msub><mml:mrow /><mml:mrow><mml:mn>3</mml:mn><mml:mo>−</mml:mo><mml:mi>δ</mml:mi></mml:mrow></mml:msub></mml:math> for HER, which is related to the formation of oxygen vacancies around active Co/Fe ions. By comparison with the benchmarking Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M4><mml:msub><mml:mrow /><mml:mrow><mml:mn>3</mml:mn><mml:mo>−</mml:mo><mml:mi>δ</mml:mi></mml:mrow></mml:msub></mml:math>, one of the most spotlighted perovskite oxides, the Ba 0.95 Co 0.4 Fe 0.4 Zr 0.1 Y 0.1 O<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M5><mml:msub><mml:mrow /><mml:mrow><mml:mn>3</mml:mn><mml:mo>−</mml:mo><mml:mi>δ</mml:mi></mml:mrow></mml:msub></mml:math> oxide has lower overpotential and smaller Tafel slope. Furthermore, the Ba 0.95 Co 0.4 Fe 0.4 Zr 0.1 Y 0.1 O<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M6><mml:msub><mml:mrow /><mml:mrow><mml:mn>3</mml:mn><mml:mo>−</mml:mo><mml:mi>δ</mml:mi></mml:mrow></mml:msub></mml:math> catalyst is ultrastable in an alkaline solution. The enhanced HER performance originated from the increased active atoms adjacent to oxygen vacancies on the surface of the Ba 0.95 Co 0.4 Fe 0.4 Zr 0.1 Y 0.1 O<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M7><mml:msub><mml:mrow /><mml:mrow><mml:mn>3</mml:mn><mml:mo>−</mml:mo><mml:mi>δ</mml:mi></mml:mrow></mml:msub></mml:math> catalyst induced by Ba 2+ -deficiency doping. The low-coordinated active atoms and adjacent oxygen ions may play the role of heterojunctions that synergistically facilitate the Volmer process and thus render stimulated HER catalytic activity. The preliminary results suggest that Ba 2+ -deficiency doping is a feasible method to tailor the physical and electrochemical properties of perovskite, and that Ba 0.95 Co 0.4 Fe 0.4 Zr 0.1 Y 0.1 O<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M8><mml:msub><mml:mrow /><mml:mrow><mml:mn>3</mml:mn><mml:mo>−</mml:mo><mml:mi>δ</mml:mi></mml:mrow></mml:msub></mml:math> is a potential catalyst for HER." @default.
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• W2890913570 date "2018-09-12" @default.
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• W2890913570 title "Evaluation of A-Site Ba²⁺-Deficient Ba<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M1><mml:msub><mml:mrow /><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:math>Co_0.4Fe_0.4Zr_0.1Y_0.1O<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=M2><mml:msub><mml:mrow /><mml:mrow><mml:mn>3</mml:mn><mml:mo>−</mml:mo><mml:mi>δ</mml:mi></mml:mrow></mml:msub></mml:math> Oxides as …" @default.
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• W2890913570 doi "https://doi.org/10.1155/2018/1341608" @default.
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