Controlled synthesis of Pt-decorated Au nanostructure and its promoted activity toward formic acid electro-oxidation

Au as an efficient promoter for electrocatalytic oxidation of formic acid and carbon monoxide: a comparison between Pt-on-Au and PtAu alloy catalysts

“…With the ratio of Pt/Au up to 3.44:1, the current density of peak I decreases; however, a new peak (peakII) appears at a more positive potential. Peak I becomes smaller and finally vanishes at a lower Pt/Au ratio, indicating a less or no poisoning on PtAu alloy catalyst by CO ads with the increasing Au composition [46]. It can be clearly observed that peaks I and II lose their intensity rapidly on the PtAu alloy catalysts (Pt/Au=0.94:1 and 1:2.04).…”

“…When the Pt composition on/in Au becomes larger, the H ads / des peaks and the reduction peaks of Pt oxide markedly increase. Kristian [46] pointed out that the Pt entities on the Au surface have more negative potential for the reduction of Pt oxide at lower Pt/Au ratios since it makes obtaining electrons more difficult for Pt atoms compared to higher Pt/Au ratios and pure Pt.…”

“…However, upon further decreasing the ratio of Pt/Au to 1:2.70 and 1:3.85, peak I was not observed, while the intensity of peak II obviously becomes larger. Kristian and co-workers [46] has pointed out that the up-shift in the d-band center of the Pt atoms results in increasing Pt-CO bond strength. Fig.…”

Highly Durable Platinum Single‐Atom Alloy Catalyst for Electrochemical Reactions

“…[2,4] Single atomic Pt on θ-Al 2 O 3 showed high activity for www.advenergymat.de www.advancedsciencenews.com electronic or geometric structure. [3,25,26] Among various strategies, a single atomic Pt structure would have high activity and selectivity in the FAOR, because only 1-2 Pt atoms are required for the direct path, while Pt ensemble sites are required for the indirect path. [24] In this work, antimony-doped tin oxide (ATO) was selected as a support for the single atomic Pt electrocatalyst because of its strong interaction with Pt, high electronic conductivity, and high corrosion resistance in an acidic environment.…”

Synthesis, characterization and application of trans-D–B–A-porphyrin based dyes in dye-sensitized solar cells

“…To improve the performance of porphyrin dyes, porphyrins with extendedconjugation and efficient anchoring groups have been designed and this led to better photo-voltaic performance. Porphyrin based push-pull chromophores shows large conjugation and strong electronic interaction between chromophores as previously reported [26][27][28], and this type of sensitizers can facilitate the direction of electron injection, reduce the aggregation on a TiO 2 surface, tune the level of the excited state and increase the electron coupling between the sensitizers and the semiconductor [11]. Based on this hypothesis, we investigate a series of unsymmetrical trans-D-B-Aporphyrin based dye molecules (D = donor, B = bridge, A = acceptor) with different donating group substituent on the opposite side of the acceptor to be used for dye sensitized solar cells (DSSCs).…”