Ni2P@2D磷烯双功能电催化剂在光伏辅助全分解水制氢中的应用研究

摘要/Abstract

摘要： 近年来,二维磷烯(2D BP)因其较短的电荷传输距离、高载流子迁移率和充分暴露的表面活性位点,成为电催化剂的理想材料。然而,不适合的含氧中间体吸附能使其反应动力学迟缓,进而限制了其实际应用。本文通过引入颗粒状的非晶Ni₂P化合物,构建Ni₂P@BP异质结,在改善反应活性的基础上,提高其电化学稳定性。研究结果表明:相较于纯BP和Ni₂P电催化剂,Ni₂P@BP催化剂展现出优异的析氢(HER)和析氧(OER)催化活性,在10 mA/cm²电流密度下的过电势分别为167和186 mV。Ni₂P@BP作为双功能电催化剂,仅需1.54 V的外加偏压(V_app)就可以实现10 mA/cm²的电流密度。将其与a-Si:H/a-SiGe:H/a-SiGe:H三结叠层太阳电池连接,实现了超过7%的太阳能制氢(STH)转换效率,相较于作为双功能电催化剂的纯BP提高了95%。

关键词: 电催化剂, 二维磷烯, Ni₂P, 太阳能制氢, 太阳能电池, 全分解水

Abstract: Recently, two-dimensional phosphorene (2D BP) has become an ideal material for electrocatalysts due to its short charge transport distance, high carrier mobility and fully exposed surface active sites. However, the inadequate adsorption energy of oxygen-containing intermediates results in the sluggish reaction kinetics, and thus limits its practical application. In this paper, granular amorphous Ni₂P on the surface of BP to construct Ni₂P@BP heterostructure were introduced, in order to improve its electrochemical stability and reaction activity. The results show that, compared with the pure BP and Ni₂P catalysts, the Ni₂P@BP catalyst exhibits excellent hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) catalytic activities with an overpotential of 167 and 186 mV at a current density of 10 mA/cm², respectively. As a bifunctional electrocatalyst, Ni₂P@BP requires only 1.54 V applied bias (V_app) to achieve a current density of 10 mA/cm². Finally, over 7% solar to hydrogen (STH) coversion efficiency is achieved assisting with a-Si:H/a-SiGe:H/a-SiGe:H triple-junction solar cell, which is 95% higher than that of pure BP as a bifunctional electrocatalyst.

Key words: electrocatalyst, 2D phosphorene, Ni₂P, solar to hydrogen, solar cell, overall water splitting

中图分类号:

O734
O643

王娟, 梁俊辉, 范浩阳, 柳鸿铭, 陈达, 陈华予, 黄岳祥, 秦来顺. Ni₂P@2D磷烯双功能电催化剂在光伏辅助全分解水制氢中的应用研究[J]. 人工晶体学报, 2023, 52(4): 645-653.

WANG Juan, LIANG Junhui, FAN Haoyang, LIU Hongming, CHEN Da, CHEN Huayu, HUANG Yuexiang, QIN Laishun. Ni₂P@2D Phosphorene Bifunctional Electrocatalyst for Photovoltaic Assisted Overall Water Splitting to Hydrogen Evolution[J]. Journal of Synthetic Crystals, 2023, 52(4): 645-653.

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Ni₂P@2D磷烯双功能电催化剂在光伏辅助全分解水制氢中的应用研究

Ni₂P@2D Phosphorene Bifunctional Electrocatalyst for Photovoltaic Assisted Overall Water Splitting to Hydrogen Evolution

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