I live in New Jersey, one of the states that mandates inspection for all vehicles newer than 1995. My daily driver, a Jeep Cherokee, happens to be a 1996 model year with an OBD-II sensor, meaning I ...

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 ...

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 ...

It’s not often you get something for nothing these days, but that is exactly what O2 is offering throughout December. The mobile network provider is indulging in some festive cheer by announcing it ...

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 ...

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 ...

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 ...

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 ...

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， ...

研究背景 现阶段质子交换膜燃料电池（PEMFCs）发展瓶颈在于阴极氧还原反应 (ORR)的缓慢动力学导致严重依赖贵金属Pt基催化剂加速反应进程。然而Pt催化剂的高成本和低储量限制大规模应用。具有M-N4中心的M-N-C基催化剂，例如M-N4大环配合物和 M-N 掺杂碳 (M-N-C) ...