A PHP Error was encountered

Severity: Warning

Message: file_get_contents(https://...@gmail.com&api_key=61f08fa0b96a73de8c900d749fcb997acc09): Failed to open stream: HTTP request failed! HTTP/1.1 429 Too Many Requests

Filename: helpers/my_audit_helper.php

Line Number: 143

Backtrace:

File: /var/www/html/application/helpers/my_audit_helper.php
Line: 143
Function: file_get_contents

File: /var/www/html/application/helpers/my_audit_helper.php
Line: 209
Function: simplexml_load_file_from_url

File: /var/www/html/application/helpers/my_audit_helper.php
Line: 3098
Function: getPubMedXML

File: /var/www/html/application/controllers/Detail.php
Line: 574
Function: pubMedSearch_Global

File: /var/www/html/application/controllers/Detail.php
Line: 488
Function: pubMedGetRelatedKeyword

File: /var/www/html/index.php
Line: 316
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: Attempt to read property "Count" on bool

Filename: helpers/my_audit_helper.php

Line Number: 3100

Backtrace:

File: /var/www/html/application/helpers/my_audit_helper.php
Line: 3100
Function: _error_handler

File: /var/www/html/application/controllers/Detail.php
Line: 574
Function: pubMedSearch_Global

File: /var/www/html/application/controllers/Detail.php
Line: 488
Function: pubMedGetRelatedKeyword

File: /var/www/html/index.php
Line: 316
Function: require_once

Constructing Active Cu-O-Fe Sites at the CuO-FeO Interface to Promote Activation of Surface Lattice Oxygen. | LitMetric

AI Article Synopsis

  • * The CuO-FeO composites showed better catalytic performance compared to other structures, successfully converting toluene at a significantly lower temperature (90% conversion at 50 °C less), due to enhanced interfacial effects.
  • * Key findings included the identification of active Cu-O-Fe sites, which promoted better oxygen activity and low-temperature reactivity, along with a novel oxidation mechanism for toluene involving rapid dehydrogenation and mineralization into CO.

Article Abstract

Activating surface lattice oxygen (O) through the modulation of metal-oxygen bond strength has proven to be an effective route for facilitating the catalytic degradation of volatile organic compounds (VOCs). Although this strategy has been implemented the construction of the TM-O-TM (TM represents a transition metal) structure in various reactions, the underlying principle requires exploration when using different TMs. Herein, the Cu-O-Fe structure was created by developing CuO-FeO composites with enhanced interfacial effect, which exhibited superior catalytic activity to their counterparts, with (the temperature of toluene conversion reaching 90%) decreasing by approximately 50 °C. Structural analyses and theoretical calculations demonstrated that the active Cu-O-Fe sites at the CuO-FeO interface improved low-temperature reducibility and oxygen species activity. Particularly, X-ray absorption fine structure spectroscopy revealed the contraction and expansion of Cu-O and Fe-O bonds, respectively, which were responsible for the activation of the surface O. A mechanistic study revealed that toluene can be oxidized by rapid dehydrogenation of methyl assisted by the highly active surface O and subsequently undergo ring-opening and deep mineralization into CO following the Mars-van Krevelen mechanism. This study provided a novel strategy to explore interface-enhanced TM catalysts for efficient surface O activation and VOCs abatement.

Download full-text PDF

Source
http://dx.doi.org/10.1021/acs.est.3c05431DOI Listing

Publication Analysis

Top Keywords

active cu-o-fe
8
cu-o-fe sites
8
sites cuo-feo
8
cuo-feo interface
8
activation surface
8
surface lattice
8
lattice oxygen
8
surface
5
constructing active
4
interface promote
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!

A PHP Error was encountered

Severity: Notice

Message: fwrite(): Write of 34 bytes failed with errno=28 No space left on device

Filename: drivers/Session_files_driver.php

Line Number: 272

Backtrace:

A PHP Error was encountered

Severity: Warning

Message: session_write_close(): Failed to write session data using user defined save handler. (session.save_path: /var/lib/php/sessions)

Filename: Unknown

Line Number: 0

Backtrace: