Synthesis, structure, and photocatalytic hydrogen evolution of a trimeric Nb/W addendum cluster

Abstract

We present the second trimeric Nb/W addendum cluster Cs12[(SiW9Nb3O38)3WO3(OH)3]·33H2O with its photocatalytic hydrogen evolution activity.

Facile synthesis of ordered mesoporous molybdenum carbide electrocatalysts for high‐performance hydrogen evolution reaction

“…In particular, the low Tafel slope value of the fCMK‐3‐MoCx catalyst indicates its high activity in the HER reaction. [30–41]. The reaction mechanism is as follows: $$$\vcenter{\openup.5em\halign{$\displaystyle{#}$\cr {\rm H}{_{3}}{\rm O}{^{+}}+{\rm e}{^{- }}\rightarrow {\rm H}{_{{\rm ads}}}+{\rm H}{_{2}}{\rm O}\ ({\rm Volmer}\ {\rm reaction})\hfill\cr}}$$$ $$$\vcenter{\openup.5em\halign{$\displaystyle{#}$\cr {\rm H}{_{{\rm ads}}}+{\rm H}{_{3}}{\rm O}{^{+}}+{\rm e}{^{- }}\rightarrow {\rm H}{_{2}}+{\rm H}{_{2}}{\rm O}\ ({\rm Heyrovsky}\ {\rm reaction})\hfill\cr}}$$$ $$$\vcenter{\openup.5em\halign{$\displaystyle{#}$\cr {\rm H}{_{{\rm ads}}}+{\rm H}{_{{\rm ads}}}\rightarrow {\rm H}{_{2}}\ ({\rm Tafel}\ {\rm reaction})\hfill\cr}}$$$ …”

“…The specific surface area (BET) of the electro-catalyst play a crucial role in the charge transfer process [27][28][29]. The large BET could expose more available active sites, provide higher mass transfer efficiency, and accelerate multidimensional electron transfer, which benefits its OER/HER/ORR catalytic performance [30][31][32][33]. The mesoporous structure can significantly increase the BET of the catalyst, thereby providing a high potential electrically active surface area and promoting rapid diffusion of reactants and reaction products [34][35][36].…”

“…The Tafel values of fCMK-3-MoCx (66 mV/dec) and PtÀ C (39 mV/dec) are very close, while the Tafel slope of CMK-8-MoCx (96 mV/ dec) and CMK-3-MoCx (117 mV/dec) is higher, which indicates that the electrochemical activity of material fCMK-3-MoCx can be compared with PtÀ C. In particular, the low Tafel slope value of the fCMK-3-MoCx catalyst indicates its high activity in the HER reaction. [30][31][32][33][34][35][36][37][38][39][40][41]. The reaction mechanism is as follows:…”

Recent studies on the reaction of [X6O19]8− (X = Nb, Ta) polyanions under acidic conditions

“…4i). 47 In 2018, He and Yue, along with their colleagues, synthesized two organic-inorganic hybrid materials: 5). 48 The former demonstrates an (8,8)-connected (3 6 •4 14 Initially, these compounds exhibited monomeric composition and structural features.…”

Unraveling the Effects of Cobalt on Crystal Growth and Solution Behavior of Nb6P2W12-based Dimeric Clusters

“…Subsequently, Liu reported the preparation of tungstogermanate , and tungstoarsenate analogues. In recent years, Wang and Zhang presented several Keggin-type tungstosilicate-based transition-metal dimeric and trimeric , derivatives, respectively. On the other hand, the class of Wells–Dawson-type tungstophosphate-based MAPs was pioneered by Hill, He, and Niu. − Table S1 lists the previously reported niobotungstate-based cluters formed by Nb–O–Nb linkages.…”