Enzyme mimics have been widely used as alternatives to natural enzymes. However, the catalytic performances of enzyme mimics are often decreased due to different spatial structures or absence of functional groups compared to natural enzymes. Here, we report a highly efficient enzyme-like catalytic performance of gold nanoparticles (AuNPs) by visible-light stimulation. The enzyme-like reaction is evaluated by the catalytic reaction of AuNPs oxidizing a typical chromogenic substrate 3,3',5,5'-tetramethylbenzydine (TMB) with hydrogen peroxide as an oxidant. From investigations of the wavelength-dependent reaction rate, radical capture, hole-donor addition, and dark-field scattering spectroscopy experiments, it is revealed that the strong plasmonic absorption of AuNPs facilitates generation of hot electrons, which are transfered from AuNPs to the adsorbed reactant molecule, greatly promoting the catalytic performance of the enzyme-like catalytic reaction. The present work provides a simple method for improving the performance of enzyme mimics, which is expected to find further application in the field of plasmon-enhanced biocatalysis and biosensors.

3DGN and MOF-derived metal oxide composites as free-standing electrodes for supercapacitors have been reported for the first time which exhibit a high specific capacitance, good rate capability and excellent long cycle stability.

Poor cyclability and rate performance always impedet he development of transition metal phosphidebased anode materials. Many strategies have been used to addresst he above problems, such as the designing of hierarchicals tructures,c ombination with carbon materials, and doping with other metal elements. Considering thoses trategies, af lower-like Fe-doped CoP material is designed. The synthesis consists of microsheets grown on ac arbon membrane (CM, leaves as precursor) through ah ydrothermal methoda nd in situ phosphorization.T he Fe dopinga nd carbon membrane synergistically induce the formationo fa flower-like hierarchical microstructure duringt he crystalgrowingp rocess. The unique hierarchical microstructure in-creases thec ontact area between electrode and electrolyte, and accommodates the volume expansion duringc ycling. The hierarchicalF e-doped CoP grownd irectly on the carbon membrane increases the active sites for intercalation of sodiums pecies and furtherp romotes the internal electron conduction in the Fe-doped CoP/CM electrode. Thereby,t he Fe-doped CoP/CM as the anode electrode fors odium ion batteries exhibits ah igh specific capacityo f5 15 mA hg À1 at 100 mA g À1 after 100 cycles. Even if the current density rises to 500 mA g À1 ,t he specific capacity is stillm aintained at 324 mA hg À1 after 500 cycles, showings uperior rate performances and cyclability.

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