12:30, Fri, Dec 12, 2025 Updated: 12:35, Fri, Dec 12, 2025 Money expert Martin Lewis has urged O2 customers to report it after they were hit with unexpectedly large final bills for trying to ditch the ...

People who previously had a phone contract with O2, but ended their deal early due to the company's upcoming price hike announcement, have been urged to check if they're eligible for refunds. This ...

过氧化尿素(CO(NH2)2•H2O2)作为尿素的衍生物，已广泛应用于制药、农业、纺纱、日常化工等。CO(NH2)2•H2O2的工业生产主要依赖于尿素和H2O2这两种反应物。其中，通过碳源(CO2)和氮源(N2、NO、NO2−、NO3−)耦合高效电催化剂，可以在电化学条件下通过电催化C-N偶联反应有效地生成尿素。同时，利用高效电催化剂和活性OOH中间体的适当 ...

Getting something for nothing is rare these days, but O2 is bucking the trend this December. The popular UK mobile network - which is now part of Virgin Media - is spreading some serious festive cheer ...

O2 customers could pay as little as £6 per month, avoid exit fees and the price hikes if they switch within their 30-day window Which? Team Championing consumers since 1957, our team of over 150 ...

Adam covers home improvements and mobile networks, splitting his time investigating topics from bathrooms to phone contracts. He was shortlisted at the BSME Talent Awards 2024. Our latest research ...

Funk and acid jazz band Jamiroquai have been going for well over three decades, but they haven’t played London for six years. That’s set to change this week, however, as Jay Kay and co will play two ...

Next summer Mumford and Sons will headline BST Hyde Park, one of London’s biggest music festivals, but before all that the stomp-clap-hey folk titans are touring Britain’s biggest arenas. The final ...

James Chen, CMT is an expert trader, investment adviser, and global market strategist. Gordon Scott has been an active investor and technical analyst or 20+ years. He is a Chartered Market Technician ...

第一作者（或者共同第一作者）：彭建钊（副研究员），麦景行（硕士研究生） 通讯作者（或者共同通讯作者）：张雷教授，李慧齐助理教授，乐弦副教授 通讯单位：深圳大学 年份：2025 ...

本研究旨在开发基于海水的高性能氧还原反应（ORR）电催化剂，这对于可再生能源的存储和转换具有重要意义。目前，基于铁的衍生物被氮掺杂的碳包覆，是典型的代表。然而，揭示氮构型对ORR活性和耐氯性的机制仍然是一个巨大挑战。

在质子交换膜燃料电池(PEMFC)中，Pt是氧还原反应(ORR)活性最高的材料。然而，贵金属Pt储量稀少和价格昂贵，减少材料中Pt含量是减少其使用的最直接的策略，但这通常伴随着活性位点数量的减少或发生团聚。Pt与其他后过渡金属合金化提高了Pt的活性， ...