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PdCu nanoalloy decorated photocatalysts for efficient and selective oxidative coupling of methane in flow reactors
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PdCu nanoalloy decorated photocatalysts for efficient and selective oxidative coupling of methane in flow reactors
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Journal Article
PdCu nanoalloy decorated photocatalysts for efficient and selective oxidative coupling of methane in flow reactors
2023
Overview
Methane activation by photocatalysis is one of the promising sustainable technologies for chemical synthesis. However, the current efficiency and stability of the process are moderate. Herein, a PdCu nanoalloy (~2.3 nm) was decorated on TiO
2
, which works for the efficient, stable, and selective photocatalytic oxidative coupling of methane at room temperature. A high methane conversion rate of 2480 μmol g
−1
h
−1
to C
2
with an apparent quantum efficiency of ~8.4% has been achieved. More importantly, the photocatalyst exhibits the turnover frequency and turnover number of 116 h
−1
and 12,642 with respect to PdCu, representing a record among all the photocatalytic processes (λ > 300 nm) operated at room temperature, together with a long stability of over 112 hours. The nanoalloy works as a hole acceptor, in which Pd softens and weakens C-H bond in methane and Cu decreases the adsorption energy of C
2
products, leading to the high efficiency and long-time stability.
Efficient and stable photocatalytic oxidative coupling of methane to C2 products is revealed by Tang’s group via synergistic effects of a PdCu nanoalloy cocatalyst which achieves high TON
PdCu
of 12642 and TOF
PdCu
of 116 h
−1
with >100 hour stability.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
