Co/M II Fe layered double hydroxide (LDH) LDH photocatalysts have been designed from the aspect of employing stable halffilled Fe 3 + to trap photogenerated electrons, adjusting the M II À OÀ Fe oxo-bridged structure to optimize the short-range directional charge transmission and intercalating oxometallate anions into the LDH to further improve light absorption along with electron-hole separation and non-noble metal Co NP loading and reduction to form a heterojunction. These LDHbased photocatalysts are employed for photocatalytic H 2 evolution from ammonia borane in aqueous solution under visible light at 298 K. The photocatalytic H 2 evolution activity is greatly improved through adjustment of the M II À OÀ Fe oxobridged structure and molybdate intercalation into the LDH. Turnover frequencies of up to 113.2 min À 1 are achieved with Co/CoFeÀ Mo. Alongside the experimental results and materials characterization, capture experiments and in situ DRIFTS analysis are carried out to study the photocatalytic hydrogen production mechanism.

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Novel porous tubular Rh/PCN exhibited highly promoted activity in hydrodechlorination of harmful chlorophenols to high-value cyclohexanol and cyclohexanone with base-free aqueous medium and balloon H2 pressure under the irradiation of visible light.