Mn-doped NiP2 nanosheets as an efficient electrocatalyst for enhanced hydrogen evolution reaction at all pH values
Mn-doped NiP2 nanosheets as an efficient electrocatalyst for enhanced hydrogen evolution reaction at all pH values
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Mn 掺杂 NiP2 纳米片作为有效电催化剂,可在所有 pH 值下增强析氢反应
DOI:
10.1016/j.jpowsour.2018.03.053
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发表时间:
2018-05
影响因子:
9.2
通讯作者:
Chen Shijian
中科院分区:
文献类型:
--
作者:
Wang Xiaodeng;Zhou Hongpeng;Zhang Dingke;Pi Mingyu;Feng Jiajia;Chen Shijian
Developing stable and high-efficiency hydrogen generation electrocatalysts, particularly for the cathode hydrogen evolution reaction (HER), is an urgent challenge in energy conversion technologies. In this work, we have successfully synthesized Mn-doped NiP2nanosheets on carbon cloth (Mn-NiP2NSs/CC), which behaves as a higher efficient three dimensional HER electrocatalyst with better stability at all pH values than pure NiP2. Electrochemical tests demonstrate that the catalytic activity of NiP2is enhanced by Mn doping. In 0.5 M H2SO4, this Mn−NiP2NSs/CC catalyst drives 10 mA cm−2at an overpotential of 69 mV, which is 20 mV smaller than pure NiP2. To achieve the same current density, it demands overpotentials of 97 and 107 mV in 1.0 M KOH and phosphate-buffered saline (PBS), respectively. Compared with pure NiP2, higher HER electrocatalytic performance for Mn−NiP2NSs/CC can be attributed to its lower thermo-neutral hydrogen adsorption free energy, which is supported by density functional theory calculations.
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