首先分析了聚碳酸酯工程塑料表面无铬微蚀的研究现状,并归纳了几种不同微蚀方法对聚碳酸酯基板的处理效果,重点介绍了一种环境友好的二氧化锰-硫酸微蚀体系。经过该体系的微蚀处理,聚碳酸酯表面形成了大量孔径均匀且深度适中的微孔,表...首先分析了聚碳酸酯工程塑料表面无铬微蚀的研究现状,并归纳了几种不同微蚀方法对聚碳酸酯基板的处理效果,重点介绍了一种环境友好的二氧化锰-硫酸微蚀体系。经过该体系的微蚀处理,聚碳酸酯表面形成了大量孔径均匀且深度适中的微孔,表面粗糙度增大,同时基板表面由憎水性变为强的亲水性,高表面粗糙度与强亲水性的共同作用将基板与镀层间的粘结强度提高到1.10 k N/m。展开更多
The development of highly active catalyst in pH-neutral media for oxygen evolution reaction(OER)is critical in the field of renewable energy storage and conversion.Nevertheless,the slow kinetics of proton-coupled elec...The development of highly active catalyst in pH-neutral media for oxygen evolution reaction(OER)is critical in the field of renewable energy storage and conversion.Nevertheless,the slow kinetics of proton-coupled electron transfer(PCET)hinders the overall OER efficiency.Herein,we report an ionic liquid(IL)modified CoSn(OH)_(6)nanocubes(denoted as CoS-n(OH)_(6)-IL),which could be prepared through a facile strategy.The modified IL would not change the structural character-istics of CoSn(OH)_(6),but could effectively regulate the local proton activity near the active sites.The CoSn(OH)_(6)-IL exhibited higher intrinsic OER performances than the pristine CoSn(OH)_(6)in neutral media.For example,the current density of CoS-n(OH)_(6)-IL at 1.8 V versus reversible hydrogen electrode(RHE)was about 4 times higher than that of CoSn(OH)_(6).According to the pH-dependent kinetic investigations,operando electrochemical impedance spectroscopic,chemical probe tests,and deuterium kinetic isotope effects,the interfacial layer of IL could be utilized as a proton transfer mediator to promote the proton transfer,which enhances the surface coverage of OER intermediates and reduces the activation barrier.Consequent-ly,the sluggish OER kinetics would be efficiently accelerated.This study provides a facile and effective strategy to facilitate the PCET processes and is beneficial to guide the rational design of OER electrocatalysts.展开更多
文摘首先分析了聚碳酸酯工程塑料表面无铬微蚀的研究现状,并归纳了几种不同微蚀方法对聚碳酸酯基板的处理效果,重点介绍了一种环境友好的二氧化锰-硫酸微蚀体系。经过该体系的微蚀处理,聚碳酸酯表面形成了大量孔径均匀且深度适中的微孔,表面粗糙度增大,同时基板表面由憎水性变为强的亲水性,高表面粗糙度与强亲水性的共同作用将基板与镀层间的粘结强度提高到1.10 k N/m。
基金supported by the National Natural Science Foundation of China(22209040,22202063).
文摘The development of highly active catalyst in pH-neutral media for oxygen evolution reaction(OER)is critical in the field of renewable energy storage and conversion.Nevertheless,the slow kinetics of proton-coupled electron transfer(PCET)hinders the overall OER efficiency.Herein,we report an ionic liquid(IL)modified CoSn(OH)_(6)nanocubes(denoted as CoS-n(OH)_(6)-IL),which could be prepared through a facile strategy.The modified IL would not change the structural character-istics of CoSn(OH)_(6),but could effectively regulate the local proton activity near the active sites.The CoSn(OH)_(6)-IL exhibited higher intrinsic OER performances than the pristine CoSn(OH)_(6)in neutral media.For example,the current density of CoS-n(OH)_(6)-IL at 1.8 V versus reversible hydrogen electrode(RHE)was about 4 times higher than that of CoSn(OH)_(6).According to the pH-dependent kinetic investigations,operando electrochemical impedance spectroscopic,chemical probe tests,and deuterium kinetic isotope effects,the interfacial layer of IL could be utilized as a proton transfer mediator to promote the proton transfer,which enhances the surface coverage of OER intermediates and reduces the activation barrier.Consequent-ly,the sluggish OER kinetics would be efficiently accelerated.This study provides a facile and effective strategy to facilitate the PCET processes and is beneficial to guide the rational design of OER electrocatalysts.
