Highly sensitive and fast-response hydrogen sensing of WO₃ nanoparticles via palladium reined spillover effect

Abstract

Hydrogen sensing simultaneously endowed with fast response, high sensitivity and selectivity are highly desired in detecting hydrogen leakages such as in those hydrogen-driven vehicles and space rockets. Here, hydrogen sensing...

Gas Sensing Technology for the Detection and Early Warning of Battery Thermal Runaway: A Review

“…Furthermore, the hydrogen adsorption energy of the MOS is dependent on anchored noble metals. The formed PdH x intermediates can greatly improve the selectivity of the MOS to hydrogen . Wang et al prepared two-dimensional porous TiO 2 nanosheets by graphene oxide (GO) template method and further introduced Pd nanoparticles onto these nanosheets by impregnation technique to obtain the final Pd-TiO 2 nanosheets.…”

“…The H 2 sensor based on Pd-TiO 2 nanosheets exhibited the instantaneous response, low detection limit (1 ppm), good selectivity, and linear response (Figure d–f), which were mainly attributed to the unique porous two-dimensional structure and the synergistic effect between Pd and TiO 2 (including the high adsorption ability of Pd-TiO 2 toward both O 2 and H 2 as well as the effective catalysis ability of Pd toward H 2 ). Zhu et al synthesized Pd-WO 3 nanoparticles by combining the hydrolysis, annealing, and in situ photoelectric deposition. Pd-WO 3 exhibited a surprisingly high response of 22867 toward 500 ppm H 2 , with a low operating temperature of 50 °C and a fast response of 1.2 s. The significantly improved H 2 -sensing performance of Pd-WO 3 was attributed to the overflow effect caused by the Pd nanoparticles around WO 3 .…”

“…73 The decorated Pd in the MOS material can play a catalytic role in splitting molecular hydrogen into atomic ones, in which the electronic sensitization and spillover effect (chemical sensitization) significantly promote the gas-sensing performance. 77 Furthermore, the hydrogen adsorption energy of the MOS is dependent on anchored noble metals. The formed PdH x intermediates can greatly improve the selectivity of the MOS to hydrogen.…”

Intensifying Hydrogen Spillover for Boosting Electrocatalytic Hydrogen Evolution Reaction

“…In general, hydrogen spillover is a surface phenomenon that refers to the hydrogen transfer from hydrogen‐enriched metal nanoparticle to hydrogen‐deficient support, which should include the hydrogen suppliers and hydrogen acceptor sites. The nature of hydrogen spillover associated with the atomic interaction between active hydrogen atoms and the support material [46–48] . Hydrogen spillover phenomenon was discovered in the 1964 and denoted in 1969 [28] .…”

SO3 decomposition over silica-modified β-SiC supported CuFe2O4 catalyst: characterization, performance, and atomistic insights

“…[1][2][3][4][5][6][7][8][9][10] Hydrogen is one of the renewable energy resource whose demand as an energy currency is expected to increase significantly in near future because of its abundance in the universe. [11][12][13][14][15] It is the lightest fuel that produces clean energy with high energy density on a mass basis and can be produced from water. [16][17][18][19][20][21][22] The sulfur-iodine (S-I) cycle is one of the most efficient (∼52%) thermochemical water-splitting cycles with a low cost of hydrogen production (∼2$ per kg H 2 ) and low global warming potential, GWP (0.48 kg CO 2 eq.…”