Palladium and platinum thin films for low-concentration resistive hydrogen sensor: a comparative study

Sub-50 nm patterning of alloy thin films via nanophase separation for hydrogen gas sensing

“…This cyclic change in electrical resistance was consistently observed each time the H 2 and O 2 atmospheres were alternated. 27,28 Importantly, the switching of the atmospheres induced no irreversible change in resistance, underscoring the reversible nature of terminalized Pt#CeO 2 /Si as a reliable probe for H 2 sensing.…”

Nanostructured Platinum and Platinum Alloy-Based Resistive Hydrogen Sensors: A Review

“…Pt nanowire array 1-1,000,000 200 ~18.4 (for 10,000 ppm) [10] Pt nanowire array 1-1000 RT ~5 (RT for 1000 ppm) [14] Pt-modified Pd nanowires 500-50,000 RT to 100 ~4 (RT for 10,000 ppm) [16] Pd@Pt core-shell nanocrystal layer 10-40,000 RT to 250 ~3.6 (150 • C for 10,000 ppm) [17] Pt@Au core-shell nanoparticle layer 1000-100,000 RT to 80 ~15 (RT for 100,000 ppm) [15] PtOx/Pt nanowire 0.5-1000 RT ~65 (for 500 ppm) [18] Ultrafine Pt nanowire network 1-5000 RT ~261 (for 5000 ppm) [19] RT 1 (for all conc.) 3.5 nm Pt thin film 10-1000 100 ~4 (for 500 ppm) [6] 200 ~8 (for 500 ppm) 10 nm Pt thin film ~1.5 (RT for 10,000 ppm) 20 nm Pt thin film 10-10,000 RT to 60 ~0.5 (RT for 10,000 ppm) [20] 40 nm Pt thin film ~0.4 (RT for 10,000 ppm) 5 nm Pt thin film 100-10,000 RT ~4 (for 10,000 ppm) [21] 2 nm Pt thin film 1000-10,000 RT to 200 ~2.8 (RT for 1000 ppm) [9] 5 nm Pt thin film 0.5-200 150 ~4.5 (for 200 ppm) [13] 2 nm Pt thin film 30-1000 RT to 100 ~2.4 (RT for 1000 ppm) [22] 150 nm Pt nanoporous film 100-1000 RT to 100 3.5 (RT for 1000 ppm) [7] 3 nm Nanoporous Pt Film 10-50,000 RT to 150 13.0 (RT for 10,000 ppm) [12] Pt/Pd bimetallic film 10-40,000 RT to 150 13.5 (150 • C for 10,000 ppm) [23]…”

Rare Earth Material for Hydrogen Gas Sensing: PtGd Alloy Thin Films as a Promising Frontier

“…In the class of resistive metallic sensors, these devices often incorporate sensitive layers of palladium (Pd), platinum (Pt), or their alloys, marking significant advances in sensor technology. This sector has seen the development of various nanostructured Pt materials, including nonporous films [13,14], nanowires [15][16][17][18][19], thin films [20][21][22][23][24] and layered PtPd and PtTi thin films [25,26], as well as PtAu and PtPd nanoparticle layers [27,28], Pt-modified Pd nanowires [29], PtPd nanoparticle-polymer composites [30], Pt and PtRh nanosheets [31] and different alloy (PtPd, PtNi and PtCo) films [32][33][34]. These innovations underscore the versatility of Pt-based sensor technology, which allows for numerous structural adaptations to optimize hydrogen sensing.…”