Details

Autor(en) / Beteiligte

• Zhai, Panlong
• Zhang, Yanxue
• Wu, Yunzhen
• Gao, Junfeng
• Zhang, Bo
• Cao, Shuyan
• Zhang, Yanting
• Li, Zhuwei
• Sun, Licheng
• Hou, Jungang

Titel

Engineering active sites on hierarchical transition bimetal oxides/sulfides heterostructure array enabling robust overall water splitting

Ist Teil von

• Nature communications, 2020-10, Vol.11 (1), p.5462-5462, Article 5462

Ort / Verlag

London: Nature Publishing Group UK

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Rational design of the catalysts is impressive for sustainable energy conversion. However, there is a grand challenge to engineer active sites at the interface. Herein, hierarchical transition bimetal oxides/sulfides heterostructure arrays interacting two-dimensional MoO x /MoS 2 nanosheets attached to one-dimensional NiO x /Ni 3 S 2 nanorods were fabricated by oxidation/hydrogenation-induced surface reconfiguration strategy. The NiMoO x /NiMoS heterostructure array exhibits the overpotentials of 38 mV for hydrogen evolution and 186 mV for oxygen evolution at 10 mA cm −2 , even surviving at a large current density of 500 mA cm −2 with long-term stability. Due to optimized adsorption energies and accelerated water splitting kinetics by theory calculations, the assembled two-electrode cell delivers the industrially relevant current densities of 500 and 1000 mA cm −2 at record low cell voltages of 1.60 and 1.66 V with excellent durability. This research provides a promising avenue to enhance the electrocatalytic performance of the catalysts by engineering interfacial active sites toward large-scale water splitting. While water splitting is an appealing carbon-neutral strategy for renewable energy generation, there is a need to develop new active, cost-effective catalysts. Here, authors prepare a nickel-molybdenum oxide/sulfide heterojunctions as bifunctional H 2 and O 2 evolution electrocatalysts.