Electron-transfer enhanced MoO2-Ni heterostructures as a highly efficient pH-universal catalyst for hydrogen evolution

Metal–Organic Framework (MOF)‐Derived Electron‐Transfer Enhanced Homogeneous PdO‐Rich Co3O4 as a Highly Efficient Bifunctional Catalyst for Sodium Borohydride Hydrolysis and 4‐Nitrophenol Reduction

“…The fitted Pd 3d 5/2 and Pd 3d 3/2 peaks located at 337.1 eV and 342.3 eV are attributed to PdO [28] . Compared with commercial PdO, it can be found that the Pd 3d 5/2 peak in PdO‐Co 3 O 4 moved by −0.31 eV owing to the electron transfer from Co species to Pd species, resulting in higher electron density on PdO species [29, 31] . As the content of Co 3 O 4 in PdO‐Co 3 O 4 is much higher than that of PdO, almost no change in Co 2p is observed.…”

“…This test cycle was repeated five times, and around 80 % of the initial activity was retained after five cycles (Figure 6 d). The slight decrease in catalytic activity may be mainly due to the structural damage (Figure S13 in the Supporting Information), Pd clusters exfoliation (Table S1 in the Supporting Information), surface chemical state changes (Figure S14 in the Supporting Information), and BO 2 − poisoning [29, 34] …”

“…The slight decrease in catalytic activity may be mainly due to the structural damage ( Figure S13 in the Supporting Information), Pd clusters exfoliation (Table S1 in the Supporting Information), surface chemical state changes (Figure S14 in the Supporting Information), and BO 2 À poisoning. [29,34] As discussed above, the PdO-Co 3 O 4 catalysth as the largest HGR andT OF values comparew ith otherc atalysts. The outstanding performance is mainly attributed to al arge specific surfacea rea, high conductivity,a nd synergyb etween PdO and Co 3 O 4 species.…”

“…[28] Compared with commercial PdO, it can be found that the Pd 3d 5/2 peak in PdO-Co 3 O 4 movedb yÀ0.31 eV owing to the electron transfer from Co species to Pd species, resulting in highere lectron density on PdO species. [29,31] As the content of Co 3 O 4 in PdO-Co 3 O 4 is much highert han that of PdO, almostn oc hange in Co 2p is observed. The strong electronic interaction between different specieswill affect the adsorption, transformation,a nd desorption capabilities of active sites, thereby synergistically improving the catalytic activity.N otably, this strong interaction mayb eu nique to the PdO-Co 3 O 4 composite as no such shift waso bserved when we used as imilar methodt or eplaceC ow ith Zn to construct PdO x -ZnO (Figure S9 in the SupportingI nformation).…”

Molybdenum‐tungsten Oxide Nanowires Rich in Oxygen Vacancies as An Advanced Electrocatalyst for Hydrogen Evolution

“…Transition metal oxides (TMOs) have attracted less attention from researchers due to their poor electrical conductivity and few active sites . However, the transition metal oxides is considered to be promising electrocatalysts because of their rich reservations and potential catalytic activity, so it has great potential to develop high‐performance transition metal oxide catalysts through specific adjustments . Among these non‐noble metal oxides, tungsten trioxide (WO 3 ) has attracted a certain research interest owing to its abundant reserves, wide application range and strong stability .…”