The treatment of nitroaromatics in wastewater is a significant issue that must be addressed because of their high cytotoxicity.The catalytic reduction of 4-nitrophenol(4-NP)to the widely used 4-aminophenol(4-AP)is an ...The treatment of nitroaromatics in wastewater is a significant issue that must be addressed because of their high cytotoxicity.The catalytic reduction of 4-nitrophenol(4-NP)to the widely used 4-aminophenol(4-AP)is an excellent method for 4-NP removal.However,performing this reaction is difficult.In this study,two-dimensional(2D)graphene oxide(GO)with oxygen-containing surface groups was used as a substrate for the in situ anchoring ofPdAu alloy nanocrystals.展开更多
The development of high-performance,low-cost bifunctional catalysts with long-term stability for the oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)is one of the most critical challenges for the large...The development of high-performance,low-cost bifunctional catalysts with long-term stability for the oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)is one of the most critical challenges for the large-scale application of metal-air batteries.Herein,we report an advanced nitrogen-doped mesoporous carbon(NMC)composite(NiCo2O4/CoNx-NMC)formed from a mixture of Co-and Ni-hydroxide-infiltrated phenolic resin and melamine resin.This composite exhibits superior electrocatalytic activity,stability,and selectivity for the ORR and OER.The activity parameter(DE),which is an indicator of the overall catalytic activity of bifunctional catalysts,was 0.76 V for NiCo2O4/CoNx-NMC.Therefore,catalyst outperforms the majority of previously reported non-precious metal-based bifunctional electrocatalysts.The remarkable ultra-high catalytic performance of NiCo2O4/CoNx-NMC for the ORR and OER can be attributed to the presence of different active sites of the CoNx structure and the formation of NiCo2O4 with the spinel structure,which was obtained by a stepwise pyrolysis process.This synthesis strategy opens a new avenue for the rational design of highly active bifunctional electrocatalysts.展开更多
Hydrogen production via electrochemical water splitting is a promising and green technology.As one of the most representative transition metal sulfides layered materials,Molybdenum disulfide(MoS_(2))has immense potent...Hydrogen production via electrochemical water splitting is a promising and green technology.As one of the most representative transition metal sulfides layered materials,Molybdenum disulfide(MoS_(2))has immense potential for the hydrogen evolution reaction(HER).We successfully prepared a nitrogen-doped carbon(NC)in situ-grown erbium-doped MoS_(2)polyhedral structure(Er-MoS_(2)/NC)that incorporates an interfacial Mo-N coupling phase.展开更多
基金financially supported by the National Natural Science Foundation of China (No.U2002213)the Double Tops Joint Fund of Yunnan Science and Technology Bureau and Yunnan University (No.2019FY003025)+1 种基金Double First-Class University Plan (No.C176220100042)support from Vetenskapsradet (Nos.2017-04862 and 2021-04629)。
文摘The treatment of nitroaromatics in wastewater is a significant issue that must be addressed because of their high cytotoxicity.The catalytic reduction of 4-nitrophenol(4-NP)to the widely used 4-aminophenol(4-AP)is an excellent method for 4-NP removal.However,performing this reaction is difficult.In this study,two-dimensional(2D)graphene oxide(GO)with oxygen-containing surface groups was used as a substrate for the in situ anchoring ofPdAu alloy nanocrystals.
基金financially supported by the National Natural Science Foundation of China(No.21677171)the West Light Foundation of Chinese Academy of Sciences(No.2016-YJRC-1)。
文摘The development of high-performance,low-cost bifunctional catalysts with long-term stability for the oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)is one of the most critical challenges for the large-scale application of metal-air batteries.Herein,we report an advanced nitrogen-doped mesoporous carbon(NMC)composite(NiCo2O4/CoNx-NMC)formed from a mixture of Co-and Ni-hydroxide-infiltrated phenolic resin and melamine resin.This composite exhibits superior electrocatalytic activity,stability,and selectivity for the ORR and OER.The activity parameter(DE),which is an indicator of the overall catalytic activity of bifunctional catalysts,was 0.76 V for NiCo2O4/CoNx-NMC.Therefore,catalyst outperforms the majority of previously reported non-precious metal-based bifunctional electrocatalysts.The remarkable ultra-high catalytic performance of NiCo2O4/CoNx-NMC for the ORR and OER can be attributed to the presence of different active sites of the CoNx structure and the formation of NiCo2O4 with the spinel structure,which was obtained by a stepwise pyrolysis process.This synthesis strategy opens a new avenue for the rational design of highly active bifunctional electrocatalysts.
基金financially supported by the Science Foundation of Donghai Laboratory(No.DH-2022KF0314)the Open Fund of Hubei Longzhong Laboratory(No.2022KF07)+3 种基金the National Natural Science Foundation of China(Nos.U2002213 and 21975001)the Open Foundation of State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures(No.2022GXYSOF10)the Support Program of Excellent Young Talents in Anhui Provincial Colleges and Universities(No.gxyqZD2022034)the Double First Class University Plan(No.C176220100042)。
文摘Hydrogen production via electrochemical water splitting is a promising and green technology.As one of the most representative transition metal sulfides layered materials,Molybdenum disulfide(MoS_(2))has immense potential for the hydrogen evolution reaction(HER).We successfully prepared a nitrogen-doped carbon(NC)in situ-grown erbium-doped MoS_(2)polyhedral structure(Er-MoS_(2)/NC)that incorporates an interfacial Mo-N coupling phase.
