A corrugated reduced graphene oxide(rGO)-supported Pd composite on carbon paper(Pd/rGO/CP)is prepared via a simple chemical reduction process combined with electrodeposition.The micros tructure,morphology,and surface ...A corrugated reduced graphene oxide(rGO)-supported Pd composite on carbon paper(Pd/rGO/CP)is prepared via a simple chemical reduction process combined with electrodeposition.The micros tructure,morphology,and surface chemical state of the composite and its performance in H_(2)O_(2)reduction in an acidic medium are investigated.An rGO film with ample corrugated wrinkles coated closely on CP is prepared,and Pd nanoparticles are evenly decorated on the surface of rGO/CP.The Pd/rGO/CP electrode has a low Pd loading and high catalytic performance for H_(2)O_(2)reduction in acidic media compared to Pd/CP.An excellent mass normalized activity(11,783 A·g_(Pd)^(-1))of the Pd/rGO/CP electrode for H_(2)O_(2)reduction is achieved at 0 V due to the corresponding low Pd loadings.Mg-H_(2)O_(2)semi-fuel cells using Pd/rGO/CP electrode as the cathode exhibits a peak power density of215 mW·cm^(-2)at 60℃and perfect stability during a 50-h discharge.The rGO interlayer forms a microscopic threedimensional(3 D)structure on the surface of CP,thereby improving the utilization of precious metals and the specific surface area,as well as providing more Pd sites due to the transfer of electrons to Pd.Consequently,the performance of the electrode is improved.展开更多
基金financially supported by the National Natural Science Foundation of China (No.21463017)the Natural Science Foundation of Inner Mongolia (No.2018BS02005)+3 种基金the Natural Science Foundation of Jiangsu Province (No. BK20171169)the Natural Science Foundation of Jiangsu Higher Education Institutions of China (Nos.19KJA430020 and 21KJA150005)Jiangsu Qing Lan Project (2020)the Opening Foundation of Key Laboratory of Superlight Materials and Surface Technology,Ministry of Education,Harbin Engineering University
文摘A corrugated reduced graphene oxide(rGO)-supported Pd composite on carbon paper(Pd/rGO/CP)is prepared via a simple chemical reduction process combined with electrodeposition.The micros tructure,morphology,and surface chemical state of the composite and its performance in H_(2)O_(2)reduction in an acidic medium are investigated.An rGO film with ample corrugated wrinkles coated closely on CP is prepared,and Pd nanoparticles are evenly decorated on the surface of rGO/CP.The Pd/rGO/CP electrode has a low Pd loading and high catalytic performance for H_(2)O_(2)reduction in acidic media compared to Pd/CP.An excellent mass normalized activity(11,783 A·g_(Pd)^(-1))of the Pd/rGO/CP electrode for H_(2)O_(2)reduction is achieved at 0 V due to the corresponding low Pd loadings.Mg-H_(2)O_(2)semi-fuel cells using Pd/rGO/CP electrode as the cathode exhibits a peak power density of215 mW·cm^(-2)at 60℃and perfect stability during a 50-h discharge.The rGO interlayer forms a microscopic threedimensional(3 D)structure on the surface of CP,thereby improving the utilization of precious metals and the specific surface area,as well as providing more Pd sites due to the transfer of electrons to Pd.Consequently,the performance of the electrode is improved.