High index surface-exposed and composition-graded PtCu3@Pt3Cu@Pt nanodendrites for high-performance oxygen reduction

Noble metal nanodendrites: growth mechanisms, synthesis strategies and applications

“…The contribution of nanodendrites to the ORR is attributed to the large number of high-index crystal facets exposed at the edge of the structure since the ORR activity is particularly facetdependent. 197,198 This crystallographic dependence appears probably due to the structural sensitivity of the OH ads species to Pt{hkl}, which can selectively block the active site of O 2 adsorption on different crystal facets, thus retarding the ORR kinetics. 55 Chen and coworkers synthesized FePt nanodendrites with a single crystal structure and high-index {311} facet terminated, which showed stronger ORR catalytic activity compared to FePt nanospheres with {111} facets, nanocubes with {200} facets, and Pt nanocrystals.…”

“…For example, Pt-Co reported by Shen and coworkers exhibited the maximum E 1/2 with a value of 0.95 V. 161 PtCu 3 @Pt 3 Cu@Pt reported by Chen and coworkers exhibited the best current density with a value of 1.55 A mg À1 . 203 Unfortunately, the work reported so far only stays at the stage of interpreting the catalytic performance of the ORR with experimental data, but the electrocatalytic performance is more affected by the electronic structure. What are the changes in the electronic effect brought by the highly branched structure?…”

Oxygen reduction reaction on Pt-based electrocatalysts: Four-electron vs. two-electron pathway

“…PtNi alloys, as one of the most widely studied Pt-based alloy catalysts for 4e-ORR [52][53][54][55], have excellent activity because alloying weakens the adsorption strength of *O or *OH on Pt sites. However, the adsorption energy is not optimal and is not infinitely close to the top of the volcano diagram, indicating that the further improvement can be approached.…”

PtMo‐Au Metalloenzymes Regulated Tumor Microenvironment for Enhanced Sonodynamic/Chemodynamic/Starvation Synergistic Therapy

“…[12,13] The important indicators of whether sonosensitizers meet the therapeutic needs include ROS generation efficiency, biocompatibility, and tumor targeting capacity. [14][15][16][17] In the early days of SDT development, conventional organic small-molecule sonosensitizers played an important role. However, the non-negligible drawbacks of organic materials, such as poor water solubility, low bioavailability, and sub-optimal tumor targeting ability, have limited their further promotion.…”