| 1 | The applications of single-atom alloys in electrocatalysis:Progress and challenges显示文摘The development of cost-effective and highly efficient electrocatalysts to accelerate distinct electrochemical reactions is essential to help the industry to achieve a low-carbon footprint.Single-atom alloys(SAAs)with the characteristics of unique electronic structures,well-defined active sites,and maximum atom utilization demonstrate promising potential to replace traditional noble metal catalysts.SAAs are expected to tailor the adsorption properties of reaction species,thus promoting electrocatalytic behaviors.Herein,representative synthetic strategies including wet chemistry,galvanic replacement,dealloying,and atomic layer deposition are introduced,followed by a summary of applications of SAAs in hydrogen evolution reaction,oxygen evolution reaction,oxygen reduction reaction,carbon dioxide reduction reaction,and ethanol electro-oxidation to provide an in-depth understanding of the structure–activity relationship.Moreover,the challenges and perspectives in this emerging field of SAAs are discussed. | Yumin Da Rui Jiang Zhangliu Tian Xiaopeng Han Wei Chen Wenbin Hu | 2023 | SmartMat2023，4，1： | 1 |
| 2 | Dependence of interface energetics and kinetics on catalyst loading in a photoelectrochemical system显示文摘Solar hydrogen production by the photoelectrochemical method promises a means to store solar energy.While it is generally understood that the process is highly sensitive to the nature of the interface between the semiconductor and the electrolyte,a detailed understanding of this interface is still missing.For instance,few prior studies have established a clear relationship between the interface energetics and the catalyst loading amount.Here we aim to study this relationship on a prototypical Si-based photoelectrochemical system.Two types of interfaces were examined,one with GaN nanowires as a protection layer and one without.It was found that when GaN was present,higher Pt loading (> 0.1 μg/cm2) led to not only better water reduction (and,hence,hydrogen evolution) kinetics but also more favorable interface energetics for greater photovoltages.In the absence of the protection layer,by stark contrast,increased Pt loading exhibited no measurable influence on the interface energetics,and the main difference was observed only in the hydrogen evolution kinetics.The study sheds new light on the importance of interface engineering for further improvement of photoelectrochemical systems,especially concerning the role of catalysts and protection layers. | Yumin He Srin ivas Vanka Tianyue Gao Da He Jeremy Espano Yanyan Zhao Qi Dong Chaochao Lang Yongjie Wang Thomas W. Hamann Zetian Mi Dunwei Wang | 2019 | Nano Research2019，12，9： | 0 |
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