Direct Electrocatalytic Methanol Oxidation on MoO/Ni(OH): Exploiting Synergetic Effect of Adjacent Mo and Ni.

Ni-based materials have been widely investigated as methanol oxidation reaction (MOR) catalysts. The formation of NiOOH and its reduction to Ni(OH) are generally regarded as essential steps for methanol oxidation. However, in such an indirect route, the efficiency of proton coupled electron transfer is fundamentally limited by the rate of transition from Ni(OH) to NiOOH back and forth.

Ultrathin CuBiO on a bipolar BiO nano-scaffold: a self-powered broadband photoelectrochemical photodetector with improved responsivity and response speed.

CuBiO is a promising photoactive material for photoelectrochemical (PEC) broadband photodetectors due to its suitable band structure, but its photo-responsivity is severely limited by the short carrier diffusion length and long light penetration depth. To address the trade-off between light absorption and charge separation, a nano-structured bipolar BiO host scaffold was coupled with an ultrathin CuBiO light absorbing layer to construct a host-guest BiO/CuBiO photocathode. The work function of the bipolar BiO scaffold lies in between FTO and CuBiO, making BiO a suitable back contact layer for hole transport.

Size-Independent Reconfigurable Logic Gate with Bismuth Oxide Based Photoelectrochemical Device.

XOR gate, an important building block in computational circuits, is often constructed by combining other basic logic gates, and the hybridity inevitably leads to its complexity. A photoelectrochemical device could realize XOR function based on the current change of the photoelectrode; however, such signal is highly sensitive to photoelectrode size and therefore requires precise manufacturing at a high cost. Herein we developed a novel XOR gate based on the light-induced open-circuit potential (OCP) of the BiO photoelectrode.

Self-passivated CuVO as a universal photoelectrode material for reliable and accurate photoelectrochemical sensing.

Photoelectrochemical (PEC) detection has attracted intensive attention during the past decade. Currently, most research focuses on improving the sensitivity and selectivity of the PEC sensor, but the issue of the stability of the photoelectrode material under the testing environment is often ignored or lacks in-depth investigation. Herein, we develop a novel CuV2O6 photoelectrode exhibiting superior stability under the testing environment through self-passivation.