Ni_(2)P@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  

Ni_(2)P@2D Phosphorene Bifunctional Electrocatalyst for Photovoltaic Assisted Overall Water Splitting to Hydrogen Evolution

作　　者：王娟 梁俊辉 范浩阳 柳鸿铭 陈达[1] 陈华予 黄岳祥[1] 秦来顺[1] WANG Juan;LIANG Junhui;FAN Haoyang;LIU Hongming;CHEN Da;CHEN Huayu;HUANG Yuexiang;QIN Laishun(College of Materials and Chemistry,China Jiliang University,Hangzhou 300018,China;Hebei Normal University for Nationalities,Chengde 067000,China)

机构地区：[1]中国计量大学材料与化学学院,杭州300018 [2]河北民族师范学院,承德067000

出　　处：《人工晶体学报》2023年第4期645-653,共9页Journal of Synthetic Crystals

基　　金：浙江省省属高校基本科研业务费(2021YW35,2021YW36,2022YW62);浙江省自然科学基金(LQ23E020006);国家自然科学基金(51972294,51872271)。

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Ni_(2)P化合物,构建Ni_(2)P@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Ni_(2)P电催化剂,Ni_(2)P@BP催化剂展现出优异的析氢(HER)和析氧(OER)催化活性,在10 mA/cm^(2)电流密度下的过电势分别为167和186 mV。Ni_(2)P@BP作为双功能电催化剂,仅需1.54 V的外加偏压(Vapp)就可以实现10 mA/cm^(2)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%。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 Ni_(2) P on the surface of BP to construct Ni_(2) P@BP heterostructure were introduced,in order to improve its electrochemical stability and reaction activity.The results show that,compared with the pure BP and Ni_(2) P catalysts,the Ni_(2) P@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/cm^(2),respectively.As a bifunctional electrocatalyst,Ni_(2) P@BP requires only 1.54 V applied bias(Vapp)to achieve a current density of 10 mA/cm^(2).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.

关 键 词：电催化剂 二维磷烯 Ni_(2)P 太阳能制氢 太阳能电池 全分解水 

分 类 号：O734[理学—晶体学] O643