Ultralow-voltage hydrogen production and simultaneous Rhodamine B beneficiation in neutral wastewater  

作　　者：Xiang Peng Song Xie Shijian Xiong Rong Li Peng Wang Xuming Zhang Zhitian Liu Liangsheng Hu Biao Gao Peter Kelly Paul K.Chu 

机构地区：[1]Hubei Key Laboratory of Plasma Chemistry and Advanced Materials,Hubei Engineering Technology Research Center of Optoelectronic and New Energy Materials,School of Materials Science and Engineering,Wuhan Institute of Technology,Wuhan 430205,Hubei,China [2]Department of Physics,Department of Materials Science and Engineering,Department of Biomedical Engineering,City University of Hong Kong,Tat Chee Avenue,Kowloon 999077,Hong Kong,China [3]State Key Laboratory of Refractories and Metallurgy and Institute of Advanced Materials and Nanotechnology,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China [4]Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province,Shantou University,Shantou 515063,Guangdong,China [5]Surface Engineering Group,Manchester Metropolitan University,Manchester M15GD,UK

出　　处：《Journal of Energy Chemistry》2023年第6期574-582,I0013,共10页能源化学（英文版）

基　　金：financially supported by the Key Research and Development Program of Hubei Province (2021BAA208);the National Natural Science Foundation of China (52002294,51974208 and U2003130);the Young Top-notch Talent Cultivation Program of Hubei Province;Knowledge Innovation Program of Wuhan-Shuguang Project (2022010801020364);the City University of Hong Kong Strategic Research Grant (SRG) (7005505);the City University of Hong Kong Donation Research Grant (DONRMG 9229021)。

摘　　要：Electrocatalytic water splitting for hydrogen production is hampered by the sluggish oxygen evolution reaction(OER)and large power consumption and replacing the OER with thermodynamically favourable reactions can improve the energy conversion efficiency.Since iron corrodes easily and even self-corrodes to form magnetic iron oxide species and generate corrosion currents,a novel strategy to integrate the hydrogen evolution reaction(HER)with waste Fe upgrading reaction(FUR)is proposed and demonstrated for energy-efficient hydrogen production in neutral media.The heterostructured MoSe_(2)/MoO_(2) grown on carbon cloth(MSM/CC)shows superior HER performance to that of commercial Pt/C at high current densities.By replacing conventional OER with FUR,the potential required to afford the anodic current density of 10 m A cm^(-2)decreases by 95%.The HER/FUR overall reaction shows an ultralow voltage of 0.68 V for 10 m A cm^(-2)with a power equivalent of 2.69 k Wh per m^(3)H_(2).Additionally,the Fe species formed at the anode extract the Rhodamine B(Rh B)pollutant by flocculation and also produce nanosized magnetic powder and beneficiated Rh B for value-adding applications.This work demonstrates both energy-saving hydrogen production and pollutant recycling without carbon emission by a single system and reveals a new direction to integrate hydrogen production with environmental recovery to achieve carbon neutrality.

关 键 词：Energy-saving hydrogen production Hydrogen evolution reaction Neutral water splitting MoSe_(2)/MoO_(2)heterostructure Environmental recovery 

分 类 号：TQ116.2[化学工程—无机化工]