Controlled Growth of the Interface of CdWO_x/GDY for Hydrogen Energy Conversion

Abstract

Directly extracting hydrogen energy from water in one device to achieve sustainable hydrogen energy generation‐conversion‐electricity storage system is an ideal major step forward for enabling a zero‐pollution, hydrogen‐fueled economy. The new concept of hydrogen energy conversion can be enabled by spontaneous reduction of nitrate to ammonia driven by potential differences between the well‐matched anode and cathode, leading to the full use of the electrochemical redox reactions to generate electric energy. The hydrogen energy in the acidic electrolyte can be transformed to electric energy with the rationally assembled primary battery, which can simultaneously power the electric devices and produce high value‐added ammonia. The new concept of hydrogen conversion device shows a record‐high specific capacity of 15 500 mA h g–1 and achieves the highest ammonia production rate (149 mmol gcat–1 h–1) and Faradaic Efficiency (99.2%) in acidic electrolytes. This work opens a new direction for hydrogen conversion and utilization which has obvious advantages over lithium and battery solutions.

Optimizing the Electronic Structure of Ruthenium Oxide by Neodymium Doping for Enhanced Acidic Oxygen Evolution Catalysis

“…Water electrolysis has been considered a promising technology to alleviate the environmental and energy problems resulting from the overuse of fossil fuels. [ 1–5 ] Nevertheless, its efficiency is limited by the anodic OER due to the sluggish four‐electron process involving multiple oxygen intermediates. [ 6–8 ] Therefore, for decades, many efficient electrocatalysts have been developed to accelerate the reaction kinetics for OER.…”

A Z-scheme ZnIn2S4/ZnS heterojunction catalyst: insight into enhanced photocatalytic performance and mechanism

“…[1][2][3][4] Through catalysis, using water as the medium, converting solar energy into renewable chemical energy (hydrogen energy) is an effective way to alleviate the energy crisis and environmental pollution. [5][6][7][8][9] Therefore, the design of a highly efficient photocatalyst for hydrogen production is a top priority. Among all the kinds of semiconductor (SC) photocatalyst, metal sulfides have suitable energy band and excellent redox ability in photocatalytic hydrogen evolution.…”

Enhanced Pd/a‐WO3/VO2 Hydrogen Gas Sensor Based on VO2 Phase Transition Layer

“…Hydrogen (H 2 ) is regarded as one of the most environmentally friendly and sustainable energy sources because of its abundant natural reserves and clean combustion byproduct-water. [1][2][3][4][5] As a strongly correlated oxide, vanadium dioxide (VO 2 ) has unique phase transition characteristics with the critical temperature of about 340 K, [33] which changes from low temperature monoclinic insulator (M-VO 2 ) to high temperature rutile metallic phase (R-VO 2 ). Across the phase transition process, VO 2 shows a sharp conductivity change up to four orders of magnitude as well as a pronounced optical switching behavior.…”