関連する実験動画

Updated: Feb 7, 2026

Brain-Computer Interface-controlled Upper Limb Robotic System for Enhancing Daily Activities in Stroke Patients

Brain-Computer Interface-controlled Upper Limb Robotic System for Enhancing Daily Activities in Stroke Patients

Published on: April 18, 2025

酸性媒体におけるオペランド活性化とHER強化のための電気化学的置換法由来のCuOₓ-Pt/Cu界面

Pracheta Trivedi¹, Sandeep Yadav¹, Neha Clare Minj¹

¹Laboratory for Electrocatalysis and Energy, Department of Chemistry, Indian Institute of Technology, Kanpur 208 016, Uttar Pradesh, India. ananths@iitk.ac.in.

Dalton transactions (Cambridge, England : 2003)

|February 6, 2026

Abstract:

This work presents an interesting and easy galvanic displacement strategy for the synthesis of self-supported Pt-Cu heterointerfaces optimized for the hydrogen evolution reaction (HER) in acidic media. By galvanically replacing surface copper with Pt²⁺ ions, we achieve a unique CuO_x-Pt/Cu interface, which undergoes dynamic in situ activation during the HER to form a Pt-Cu₂O/Cu heterostructure, in which Pt is present in trace amounts. This transformation significantly enhanced the electrocatalytic HER requiring just 38 mV and 76 mV as overpotentials for 10 and 100 mA cm^-2, respectively, outperforming bulk Pt foil. The synergistic interplay between Pt, Cu₂O, and Cu is believed to have delivered superior charge transfer and active-site stabilization, while the self-supporting architecture improves catalyst durability and accessibility. Our approach demonstrates scalable, cost-efficient catalyst fabrication that maximizes Pt utilization while minimizing Pt consumption, providing a promising pathway toward next-generation HER electrocatalysts for efficient green hydrogen production under acidic conditions with ultralow Pt content.

キーワード:

水素発生反応電気化学的置換法 Pt-Cu触媒グリーン水素ヘテロ界面材料科学電気化学触媒作用

さらに関連する動画

Kinetic Screening of Nuclease Activity using Nucleic Acid Probes

Kinetic Screening of Nuclease Activity using Nucleic Acid Probes

Published on: November 1, 2019

Use of Galvanic Skin Responses, Salivary Biomarkers, and Self-reports to Assess Undergraduate Student Performance During a Laboratory Exam Activity

Use of Galvanic Skin Responses, Salivary Biomarkers, and Self-reports to Assess Undergraduate Student Performance During a Laboratory Exam Activity

Published on: February 10, 2016

関連する概念動画

Voltaic/Galvanic Cells

Voltaic/Galvanic Cells

Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...

Acidity and Basicity of Carboxylic Acid Derivatives

Acidity and Basicity of Carboxylic Acid Derivatives

Carboxylic acids are the strongest among organic acids, as they readily lose the hydroxyl proton to form a resonance-stabilized carboxylate ion. In comparison, the acid derivatives lack acidic hydrogens directly attached to a functional group. In these compounds, the acidic nature arises from their ability to lose α hydrogens, making them weakly acidic.
The relative acidic strength of the derivatives can be explained based on the extent of resonance stabilization of the conjugate base. The...

Protein-protein Interfaces

Protein-protein Interfaces

Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a...

Structures of Carboxylic Acid Derivatives

Structures of Carboxylic Acid Derivatives

Structure of Carboxylic Acid Derivatives
Carboxylic acid derivatives contain an acyl group attached to a heteroatom such as chlorine, oxygen, or nitrogen. The carbonyl carbon and oxygen are both sp2-hybridized with an unhybridized p orbital.
The three sp2 orbitals of the carbonyl carbon form three σ bonds, one each with the carbonyl oxygen, the α carbon, and the heteroatom, whereas the other two sp2 orbitals of the carbonyl oxygen are occupied by the lone pairs. Further, the unhybridized p...

Spectroscopy of Carboxylic Acid Derivatives

Spectroscopy of Carboxylic Acid Derivatives

Infrared spectroscopy is primarily used to determine the types of bonds and functional groups. In carboxylic acid derivatives, a typical carbonyl bond absorption is observed around 1650–1850 cm−1. For esters, the absorption is recorded at around 1740 cm−1, while acid halides show the absorption at about 1800 cm−1. Another acid derivative, the acid anhydrides, exhibit two carbonyl absorption around 1760 cm−1 and 1820 cm−1, arising from the symmetrical and...

Displacement Current

Displacement Current

Ampère's law, in its usual form, does not work in places where the current changes with time and is not steady. Thus, Maxwell suggested including an additional contribution, called the displacement current, Id, to the real conduction current I.