BRUSSELS — Treasury Secretary Janet L. Yellen urged European nations on Tuesday to step up their spending to assist Ukraine as Russia’s assaults on the nation’s crucial infrastructure confirmed few indicators of abating.

The US and Europe have coordinated carefully in enacting sweeping sanctions in opposition to Russia within the almost three months since its president, Vladimir V. Putin, ordered an invasion. However they’ve been much less aligned on the necessity to assist prop up Ukraine’s financial system and to help with its rebuilding as soon as the conflict ends.

Congress has already authorized a $13.6 billion emergency spending package for Ukraine and is predicted to approve one other $40 billion worth of aid. Whereas the European Union and worldwide monetary establishments have additionally been making massive assist contributions, Ms. Yellen stated that extra have to be carried out.

“I sincerely ask all our companions to hitch us in growing their monetary assist to Ukraine,” Ms. Yellen stated in a speech on the Brussels Financial Discussion board, in response to her ready remarks. “Our joint efforts are crucial to assist guarantee Ukraine’s democracy prevails over Putin’s aggression.”

The Treasury secretary is within the midst of a weeklong journey to Europe, with stops in Warsaw, Brussels and Bonn, Germany, the place she’s going to meet her counterparts on the Group of seven finance ministers summit. Support to Ukraine is predicted to be a central matter at that assembly.

Ms. Yellen stated that Ukraine’s monetary wants are instant and that it lacks funding to pay troopers, pensioners and staff to maintain its authorities operating.

“What’s clear is that the bilateral and multilateral assist introduced to date won’t be ample to deal with Ukraine’s wants, even within the brief time period,” she stated.

Whether or not her name might be heeded stays to be seen. European nations are going through their very own financial pressure, together with speedy inflation and hovering power prices, and massive challenges lie forward as they appear to wean themselves off Russian power.

Ms. Yellen stated that america would assist break Europe’s dependence on Russian power, partly by growing American exports of liquefied pure fuel. She acknowledged some local weather objectives to cut back emissions could possibly be set again by the necessity to depend on coal and fossil fuels, however she stated the present predicament ought to be a reminder of the necessity to “redouble our efforts on clear and renewable power.”

Power is one other main challenge that policymakers will focus on on the Group of seven finance ministers’ summit in Bonn later this week. The US is predicted to press the European Union to contemplate different choices forward of its plan to section in a Russian oil embargo by the top of the yr.

Treasury Division officers stated on Tuesday that they wished Europe to contemplate pricing mechanisms such a value cap or tariff that will eat away at a lot of Russia’s oil income whereas nonetheless giving the nation sufficient incentive to maintain producing.

The Treasury officers declined to share their estimates for what influence an embargo would have on the worth of oil, however they stated that constraining world oil provides risked pushing costs sharply greater at a time when inflation is already operating scorching.

In her speech, Ms. Yellen stated Russia’s determination to chop of fuel provides to Poland and Bulgaria ought to be a lesson that Western nations shouldn’t commerce nationwide safety for cheaper assets. That state of affairs has now left them weak to nations that may use their abundance of pure assets to disrupt markets.

She cited China as a priority in that regard due to its provide of uncommon earth minerals which can be used to make airplanes, vehicles and high-tech batteries.

“China is constructing a consequential market share in sure know-how merchandise and seeks a dominant place within the manufacture and use of semiconductors,” Ms. Yellen stated. “And China has employed quite a lot of unfair commerce practices in its efforts to attain this place.”

Nonetheless, Ms. Yellen made clear that she was not calling for extra protectionism or a reversal of globalization. As a substitute, she stated, nations shouldn’t put all their eggs in a single basket in the case of worldwide commerce.

“My level is to recommend that we should always take into account methods to take care of free commerce and on the similar time reduce a few of these dangers,” she stated.