Exploring noble-metal-free electrocatalysts with high efficiency for both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) holds promise for advancing the production of H2 fuel through water splitting. Herein, one-pot synthesis was introduced for MoS2–Ni3S2 heteronanorods supported by Ni foam (MoS2–Ni3S2 HNRs/NF), in which the Ni3S2 nanorods were hierarchically integrated with MoS2 nanosheets. The hierarchical MoS2–Ni3S2 heteronanorods allow not only the good exposure of highly active heterointerfaces but also the facilitated charge transport along Ni3S2 nanorods anchored on conducting nickel foam, accomplishing the promoted kinetics and activity for HER, OER, and overall water splitting. The optimal MoS2–Ni3S2 HNRs/NF presents low overpotentials (η10) of 98 and 249 mV to reach a current density of 10 mA cm–2 in 1.0 M KOH for HER and OER, respectively. Assembled as an electrolyzer for overall water splitting, such heteronanorods show a quite low cell voltage of 1.50 V at 10 mA cm–2 and remarkable stability for more than 48 h, which are among the best values of current noble-metal-free electrocatalysts. This work elucidates a rational design of heterostructures as efficient electrocatalysts, shedding some light on the development of functional materials in energy chemistry.

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What was the inspiration for this cover design?Functionalized nitroarene hydrogenation with satisfactory activity and selectivity is accomplished through incorporation of bimetallic Pt-Sn catalysts on hydrogenated MoO x (H-MoO x ) supports. The metal-support interactions contributetothe efficient turnover and the atom-rearranged bimetallic Pt-Sn surface promotes the selectivity.T his mechanism inspires the cover design, in which af ast car drives in the right direction with metersi ndicating that the hydrogenation reactioni sa ccelerateda nd directed by Pt-Sn/H-MoO x .

As promising supports, reducible metal oxides afford strong metal-support interactions to achieve efficient catalysis, which relies on their band states and surface stoichiometry. In this study, in situ and controlled hydrogen doping (H doping) by means of H spillover was employed to engineer the metal-support interactions in hydrogenated MoO -supported Ir (Ir/H-MoO ) catalysts and thus promote furfural hydrogenation to furfuryl alcohol. By easily varying the reduction temperature, the resulting H doping in a controlled manner tailors low-valence Mo species (Mo and Mo ) on H-MoO supports, thereby promoting charge redistribution on Ir and H-MoO interfaces. This further leads to clear differences in H chemisorption on Ir, which illustrates its potential for catalytic hydrogenation. As expected, the optimal Ir/H-MoO with controlled H doping afforded high activity (turnover frequency: 4.62 min ) and selectivity (>99 %) in furfural hydrogenation under mild conditions (T=30 °C, PH2 =2 MPa), which means it performs among the best of current catalysts.

Hydrogenation of α,β‐unsaturated aldehydes to unsaturated alcohols suffers a huge challenge in chemoselectivity. Herein, surface decoration by FeOx is introduced to remarkably improve the selectivity of cinnamyl alcohol (COL) in cinnamaldehyde (CAL) hydrogenation on Pt/MoO3−y. The enhanced acidity on Pt–FeOx interfaces is beneficial for the chemisorption and activation of C=O bonds, promoting selective hydrogenation. The optimal catalysts with defined FeOx decoration afford efficient and chemoselective CAL hydrogenation (91.3 % selectivity) under mild conditions (PH2=1 MPa, T=30 °C). Moreover, such innovation is further extended to develop other efficient metal (Ir, Rh and Pd) catalysts, identifying a universal promotion to Pt‐group metals. This work is anticipated to inspire the rational design of high‐performance catalysts via effective surface/interface engineering.