Herein, we put forward a novel kind of electrode by electrochemically integrating metal W species and Co2P nanosheets onto nickel foam substrate (W@Co2P/NF), which delivers excellent bifunctional activity for both...
Coupling the electrochemical oxidative upgrading of formaldehyde
(FOR) with hydrogen evolution reaction (HER) toward energy-efficient
H2 production and simultaneous chemical production is important,
but it still faces huge challenges. Herein, a unique hierarchical
heterojunction is designed by coupling a Ni(OH)2 nanosheet
with S-modified Ni species on a nickel foam substrate (S–Ni@Ni(OH)2/NF) via a two-step strategy. The Ni(OH)2 nanosheets
with a large surface area contribute to offering sufficient sites
for the grafting of S–Ni species, constructing a coupled heterostructure
to realize greatly improved reaction kinetics for both HER and FOR
processes. As a result, S–Ni@Ni(OH)2/NF delivers
an overpotential of 50 mV for HER at 10 mA cm–2 and
a low potential of 1.36 V to acquire a current density of 50 mA cm–2 for FOR. For the HER||FOR-coupled system, the built-in
electrolyzer only needs 1.58 V to realize 50 mA cm–2 as well as superior stability. This work presents a facile strategy
to exploit bifunctional electrodes for hydrogen generation via an
energy-saving way with coupled formaldehyde reforming.
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