The p-block metal(In,Sn,Bi,etc.)-based electrocatalysts have exhibited excellent activity in the electrocatalytic CO_(2)reduction(ECR)to formate.However,the rapid decrease in catalytic activity caused by catalyst reco...The p-block metal(In,Sn,Bi,etc.)-based electrocatalysts have exhibited excellent activity in the electrocatalytic CO_(2)reduction(ECR)to formate.However,the rapid decrease in catalytic activity caused by catalyst reconstruction and agglomeration under ECR conditions significantly restricts their practical applications.Herein,we developed a sulfur anchoring strategy to stabilize the high-density sub-3 nm In_(2)S_(3)nanoparticles on sulfur-doped porous carbon substrates(i-In_(2)S_(3)/S-C)for formate production.Systematic characterizations evidenced that the as-prepared catalyst exhibited a strong metal sulfide-support interaction(MSSI),which effectively regulated the electronic states of In_(2)S_(3),achieving a high formate Faradaic efficiency of 91%at−0.95 V vs.RHE.More importantly,the sulfur anchoring effectively immobilized the sub-3 nm In_(2)S_(3)nanoparticles to prevent them from agglomeration.It enabled the catalysts to exhibit much higher durability than the In_(2)S_(3)samples without sulfur anchoring,demonstrating that the strong MSSI and fast charge transfer on the catalytic interface could significantly promote the structural stability of In_(2)S_(3)catalysts.These results provide a viable approach for developing efficient and stable electrocatalysts for CO_(2)reduction.展开更多
文摘The p-block metal(In,Sn,Bi,etc.)-based electrocatalysts have exhibited excellent activity in the electrocatalytic CO_(2)reduction(ECR)to formate.However,the rapid decrease in catalytic activity caused by catalyst reconstruction and agglomeration under ECR conditions significantly restricts their practical applications.Herein,we developed a sulfur anchoring strategy to stabilize the high-density sub-3 nm In_(2)S_(3)nanoparticles on sulfur-doped porous carbon substrates(i-In_(2)S_(3)/S-C)for formate production.Systematic characterizations evidenced that the as-prepared catalyst exhibited a strong metal sulfide-support interaction(MSSI),which effectively regulated the electronic states of In_(2)S_(3),achieving a high formate Faradaic efficiency of 91%at−0.95 V vs.RHE.More importantly,the sulfur anchoring effectively immobilized the sub-3 nm In_(2)S_(3)nanoparticles to prevent them from agglomeration.It enabled the catalysts to exhibit much higher durability than the In_(2)S_(3)samples without sulfur anchoring,demonstrating that the strong MSSI and fast charge transfer on the catalytic interface could significantly promote the structural stability of In_(2)S_(3)catalysts.These results provide a viable approach for developing efficient and stable electrocatalysts for CO_(2)reduction.
